Hoisting trolley with safe hoisting effect
By using a dual wire rope winding system and tightening device in the crane, the problems of insufficient hook lifting capacity and inconvenient operation were solved, resulting in improved stability and safety, extended service life of the wire rope, and guaranteed operational safety.
Patent Information
- Application Number
- CN202520461683.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-17
- Publication Date
- 2026-01-09
- Estimated Expiration
- 2035-03-17
AI Technical Summary
Existing cranes use a single wire rope, which reduces the lifting capacity of the hook and can easily lead to inconvenience in operation and a short service life of the wire rope during lifting.
Two wire ropes are wound or released simultaneously, and the drum is driven by a power motor to ensure that the hook is always kept in the center position under the trolley. At the same time, a tightening device and a servo motor are set to adjust the length of the wire rope to prevent deflection, and anti-fall blocks are set on the guide sleeve to prevent sudden falls.
It improves the lifting capacity and stability of the hook, extends the service life of the wire rope, and protects the safety of operators and materials in case of failure.
Smart Images
Figure CN223779823U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a lifting trolley, and more particularly to a lifting trolley with a safe lifting effect. Background Technology
[0002] A crane is a multi-action lifting machine that vertically lifts and horizontally moves heavy objects within a certain range. It is also called an overhead crane or gantry crane. A bridge crane is a lifting device that spans across workshops, warehouses, and material yards for material handling. Because its two ends are supported by tall concrete pillars or metal supports, it creates a relatively wide lifting space underneath. The bridge frame of the bridge crane runs longitudinally along tracks laid on elevated structures on both sides, making full use of the space beneath the bridge frame to lift materials without being obstructed by ground equipment.
[0003] Existing cranes generally have two longitudinal tracks, on which the trolley can travel longitudinally. The trolley is equipped with a winch to wind up the wire rope, which in turn raises and lowers the hook. The hook lifts the material, and the trolley travels longitudinally to complete the lifting operation. However, most cranes have only one wire rope on the winch to raise and lower the hook. This single wire rope reduces the lifting capacity of the hook. In addition, a single wire rope is prone to pendulum motion when lifting materials and moving longitudinally with the trolley, making it inconvenient to operate when placing materials downwards. Furthermore, the excessive load on a single wire rope will also reduce its service life. Utility Model Content
[0004] The purpose of this utility model is to provide a lifting trolley with a safe lifting effect, which has the advantages of large lifting capacity, long service life of wire rope, and easy operation, and effectively solves the problems of reduced lifting capacity and inconvenient operation caused by the use of a single wire rope in the prior art.
[0005] The present invention adopts the following technical solution: a lifting trolley with safe lifting effect includes a chassis, several rollers are arranged on both sides of the lower end face of the chassis, a winch and a power motor are arranged on the upper end face of the chassis, the output shaft of the power motor is fixedly arranged to one end of the winch, and a fixing block is rotatably connected to the other end of the winch, the lower end face of the fixing block is fixedly arranged to the chassis; two steel wire ropes are wound on the winch, the other end of the steel wire ropes is connected to the chassis, and both steel wire ropes are drivenly connected to two movable pulleys arranged on the hook.
[0006] Furthermore, a tightening device is fixedly installed on the chassis, and the free end of the steel wire rope is connected to the tightening device.
[0007] Furthermore, the tightening device includes two tightening cylinders rotatably connected to the chassis; each tightening cylinder is wound around the free end of the corresponding wire rope; two servo motors are fixedly mounted on the chassis, and the output shaft of each servo motor is fixedly mounted to the corresponding tightening cylinder.
[0008] Furthermore, the chassis includes two longitudinal beams, with several rollers rotatably connected to the lower end faces of the two longitudinal beams, and several connecting rods fixedly connected between the two longitudinal beams. Three baffles are fixedly installed on the rear side of the connecting rods on the rear side. The inner ends of the two tightening cylinders are rotatably connected to the middle baffle, and the outer ends of the two tightening cylinders are rotatably connected to the corresponding outer baffles.
[0009] Furthermore, the outer surfaces of the outer baffles are all fixedly mounted to the corresponding servo motors, and the output shafts of the servo motors are fixedly mounted to the corresponding tightening cylinders.
[0010] Furthermore, several clamping blocks are fixedly installed on the front side of the rear connecting rod, and a guide sleeve is fixedly installed between each pair of adjacent clamping blocks. The free end of the wire rope passes through the corresponding guide sleeve and is wound around the corresponding tightening cylinder.
[0011] Furthermore, two fixed pulleys are fixedly installed on the upper end face of the rear connecting rod. The free end of the wire rope passes through the guide sleeve and is connected to the corresponding fixed pulley for transmission, and then is wound around the corresponding tightening cylinder.
[0012] Furthermore, a fall arrestor is fixedly installed on the wire rope above the guide sleeve. When the fall arrestor is fixed on the wire rope, the lengths of the two wire ropes released from the drum are equal.
[0013] Furthermore, a gearbox is fixedly installed on the upper end face of the left longitudinal beam, a power motor is fixedly installed on the corresponding connecting rod, the output shaft of the power motor is fixedly installed with the input shaft of the gearbox, and the output shaft of the gearbox is fixedly installed with the winch.
[0014] Furthermore, a moving motor is fixedly installed on the inner side of each of the two longitudinal beams, and the output shaft of the moving motor is fixedly installed with the corresponding roller.
[0015] I. This utility model, by setting up a winch, wire ropes, and a power motor, allows the power motor to rotate, driving the winch to rotate. The winch simultaneously winds up or releases the two wire ropes, which in turn drive the pulley to rotate, causing the hook to move upward or downward, thus achieving the purpose of lifting and lowering the hook. The simultaneous lifting and lowering of the hook by the two wire ropes ensures that the hook is always kept in the center position below the trolley, increasing the lifting capacity of the hook, as well as its stability and the service life of the wire ropes.
[0016] II. By setting up a tightening device and a servo motor, when it is found that the two wire ropes of the hook in the free state are of unequal length and the hook is deflected, the corresponding servo motor is started to drive the corresponding tightening cylinder to rotate, so that the tightening cylinder winds up the corresponding wire rope, thereby shortening the length of the corresponding wire rope, and cooperating with the other wire rope to make the hook tend to be stable and not deflected. Attached Figure Description
[0017] Figure 1 This is a schematic diagram of the overall three-dimensional structure of this utility model;
[0018] Figure 2 This is a front view structural diagram of the present utility model;
[0019] Figure 3 This is a three-dimensional structural diagram of the winch in this utility model;
[0020] Figure 4 This is a three-dimensional structural diagram of the connecting rod in this utility model;
[0021] Figure 5 This is a schematic diagram of the internal three-dimensional structure of the guide sleeve in this utility model.
[0022] In the diagram, 1. chassis; 2. roller; 3. winch drum; 4. power motor; 5. fixing block; 6. wire rope; 7. hook; 8. movable pulley; 9. tightening device; 10. tightening cylinder; 11. servo motor; 12. longitudinal beam; 13. connecting rod; 14. baffle; 15. clamping block; 16. guide sleeve; 17. fixed pulley; 18. anti-fall block; 19. gearbox; 20. moving motor. Detailed Implementation
[0023] Please see Figure 1-5 The present invention will now be described in detail with reference to the accompanying drawings and embodiments:
[0024] The lifting trolley with safe lifting effect described in this utility model includes a chassis 1. Several rollers 2 are arranged on both sides of the lower end face of the chassis 1. A winch 3 and a power motor 4 are arranged on the upper end face of the chassis 1. The output shaft of the power motor 4 is fixedly connected to one end of the winch 3, and a fixing block 5 is rotatably connected to the other end of the winch 3. The lower end face of the fixing block 5 is fixedly connected to the chassis 1. Two steel wire ropes 6 are wound on the winch 3, and the other end of the steel wire ropes 6 is connected to the chassis 1. Both steel wire ropes 6 are connected to two movable pulleys 8 on the hook 7. In use, the power motor 4 rotates, driving the winch 3 to rotate, and the winch 3 simultaneously rotates the two steel wire ropes 6. When the wire rope 6 is wound up, it drives the movable pulley 8 to rotate, which in turn drives the hook 7 to move upward, thus raising the hook 7. When the wire rope 6 is released, it drives the movable pulley 8 to rotate, which in turn drives the hook 7 to move downward, thus lowering the hook 7. The simultaneous raising and lowering of the hook 7 by both wire ropes 6 keeps the hook 7 in the center position under the trolley, increasing the lifting capacity and stability of the hook 7. After the hook 7 lifts the material, the rollers 2 rotate on the tracks set on both sides of the workshop ceiling, driving the chassis 1 to move longitudinally within the workshop, thus transporting the material.
[0025] During normal use, the lengths of the two wire ropes 6 may differ, causing the hook 7 to tilt. This results in an imbalance of forces after the hook 7 lifts a heavy object, making material handling inconvenient and reducing the service life of the wire ropes 6. To solve this problem:
[0026] In this embodiment, a tightening device 9 is fixedly installed on the chassis 1, and the free end of the wire rope 6 is connected to the tightening device 9. Before using the crane trolley, a routine inspection is performed. If the hook 7 is found to be tilted, it means that there is a difference in length between the two wire ropes 6. By activating the tightening device 9, the tightening device 9 tightens the corresponding wire rope 6, so that the length of the wire rope 6 is shortened until the hook 7 in the free state is no longer tilted and can be used normally.
[0027] In this embodiment, the tightening device 9 includes two tightening cylinders 10 rotatably connected to the chassis 1; each tightening cylinder 10 is wound around the free end of the corresponding wire rope 6; two servo motors 11 are fixedly mounted on the chassis 1, and the output shaft of each servo motor 11 is fixedly mounted to the corresponding tightening cylinder 10; in use, when it is found that the lengths of the two wire ropes 6 of the hook 7 in the free state are unequal, causing the hook 7 to deflect, the corresponding servo motor 11 is started to drive the corresponding tightening cylinder 10 to rotate, so that the tightening cylinder 10 winds up the corresponding wire rope 6, thereby shortening the length of the corresponding wire rope 6, and cooperating with the other wire rope 6, so that the hook 7 tends to be stable and not deflected.
[0028] In this embodiment, the chassis 1 includes two longitudinal beams 12. Several rollers 2 are rotatably connected to the lower end faces of the two longitudinal beams 12. Several connecting rods 13 are fixedly connected between the two longitudinal beams 12. Three baffles 14 are fixedly installed on the rear side of the connecting rods 13. The inner ends of the two tightening cylinders 10 are rotatably connected to the middle baffle 14. The outer ends of the two tightening cylinders 10 are rotatably connected to the corresponding outer baffles 14. The outer surfaces of the outer baffles 14 are fixedly installed to the corresponding servo motors 11. The output shaft of the servo motors 11 is fixedly installed to the corresponding tightening cylinders 10. The rotation of the servo motors 11 drives the corresponding tightening cylinders 10 to rotate, thereby tightening the corresponding tightening cylinders 10.
[0029] In this embodiment, a plurality of clamping blocks 15 are fixedly provided on the front side of the rear connecting rod 13. A guide sleeve 16 is fixedly provided between each pair of adjacent clamping blocks 15. The free end of the wire rope 6 passes through the corresponding guide sleeve 16 and is wound around the corresponding tightening cylinder 10. When the servo motor 11 rotates and drives the tightening cylinder 10 to rotate and wind the corresponding wire rope 6, the corresponding wire rope 6 slides in the guide sleeve 16. The guide sleeve 16 guides the wire rope 6.
[0030] In this embodiment, two fixed pulleys 17 are fixedly installed on the upper end face of the rear connecting rod 13. The free end of the wire rope 6 passes through the guide sleeve 16 and is connected to the corresponding fixed pulley 17 for transmission, and then is wound around the corresponding tightening cylinder 10. When the servo motor 11 drives the tightening cylinder 10 to rotate and tighten the wire rope 6, the wire rope 6 slides in the guide sleeve 16, and at the same time drives the fixed pulley 17 to rotate. The fixed pulley 17 plays an auxiliary role in the movement of the wire rope 6.
[0031] During normal use, if the servo motor 11 suddenly fails, it will lose control of the tensioning drum 10. Under the weight of the hook 7 and the hoisted material, the tensioning drum 10 will suddenly rotate, releasing the wire rope 6, causing the hook 7 to suddenly fall. This poses a threat to the operator's safety and may even result in economic losses. To solve this problem:
[0032] In this embodiment, a fall arrestor 18 is fixedly installed on the wire rope 6 above the guide sleeve 16. When the fall arrestor 18 is fixedly installed with the wire rope 6, the position of the fall arrestor 18 is adjusted so that when the hook 7 is in the free end state, and the lower end face of both fall arrestors 18 is in contact with the upper end face of the guide sleeve 16, the lengths of the two wire ropes 6 released from the winch 3 are equal. In daily use, although the fixed position of the fall arrestor 18 and the wire rope 6 makes the lengths of the two wire ropes 6 equal, long-term use, due to wear or assembly errors, will cause the lengths of the two wire ropes 6 to be equal. If the lengths are unequal, the servo motor 11 is rotated to adjust them so that the lengths of the two wire ropes 6 are equal, thus ensuring that the hook 7 is centered below the chassis 1 without tilting. At this time, there will be a gap between the anti-fall block 18 and the guide sleeve 16. If the servo motor 11 malfunctions and suddenly fails, and the tightening cylinder 10 loses control, the hook 7 will suddenly fall under the weight of the hook 7 and the hoisted material. At this time, the anti-fall block 18 contacts the guide sleeve 16 to block it, preventing the hook 7 from falling too much, effectively ensuring the safety of the operator and the material.
[0033] In this embodiment, a gearbox 19 is fixedly installed on the upper end face of the left longitudinal beam 12, and a power motor 4 is fixedly installed on the corresponding connecting rod 13. The output shaft of the power motor 4 is fixedly installed with the input shaft of the gearbox 19, and the output shaft of the gearbox 19 is fixedly installed with the winch 3. The power motor 4 drives the winch 3 to rotate through the gearbox 19.
[0034] In this embodiment, a moving motor 20 is fixedly installed on the inner side of each of the two longitudinal beams 12, and the output shaft of the moving motor 20 is fixedly installed with the corresponding roller 2. The moving motor 20 drives the roller 2 to rotate, so that the roller 2 rolls on the tracks on both sides of the ceiling of the workshop, thereby driving the chassis 1 to move longitudinally in the workshop to achieve the purpose of material handling.
[0035] The working principle of this utility model is as follows: During use, the power motor 4 rotates, driving the winch 3 to rotate. The winch 3 simultaneously winds or releases the two wire ropes 6. The wire ropes 6 drive the pulley 8 to rotate, simultaneously causing the hook 7 to move upwards or downwards, achieving the purpose of raising and lowering the hook 7. The simultaneous raising and lowering of the hook 7 by the two wire ropes 6 keeps the hook 7 always in the center position below the trolley, increasing the lifting capacity and stability of the hook 7. However, if the length difference between the two wire ropes 6 causes an imbalance in the hook 7 after prolonged use... The servo motor 11 is rotated to adjust the length of the two wire ropes 6 so that the hook 7 is located in the center below the chassis 1 without tilting. At this time, there will be a gap between the anti-fall block 18 and the guide sleeve 16. When the servo motor 11 fails and suddenly fails, the tightening cylinder 10 loses control. Under the weight of the hook 7 and the hoisted material, the hook 7 suddenly falls. At this time, the anti-fall block 18 contacts the guide sleeve 16 to block it and prevent the hook 7 from falling too much, effectively ensuring the safety of the operator and the safety of the material.
Claims
1. A lifting trolley with safe lifting effect, comprising a chassis (1), characterized in that: Several rollers (2) are provided on both sides of the lower end face of the chassis (1). A winch (3) and a power motor (4) are provided on the upper end face of the chassis (1). The output shaft of the power motor (4) is fixedly installed at one end of the winch (3). A fixing block (5) is rotatably connected to the other end of the winch (3). The lower end face of the fixing block (5) is fixedly installed on the chassis (1). Two steel wire ropes (6) are wound on the winch (3). The other end of the steel wire ropes (6) is connected to the chassis (1). Both steel wire ropes (6) are connected to the two movable pulleys (8) on the hook (7) for transmission.
2. The lifting trolley with safe lifting effect according to claim 1, characterized in that: A tightening device (9) is fixedly installed on the chassis (1), and the free end of the wire rope (6) is connected to the tightening device (9).
3. The lifting trolley with safe lifting effect according to claim 2, characterized in that: The tightening device (9) includes two tightening cylinders (10) rotatably connected to the chassis (1); each tightening cylinder (10) is wound around the free end of the corresponding wire rope (6); two servo motors (11) are fixedly installed on the chassis (1), and the output shaft of each servo motor (11) is fixedly installed with the corresponding tightening cylinder (10).
4. The lifting trolley with safe lifting effect according to claim 3, characterized in that: The chassis (1) includes two longitudinal beams (12), and several rollers (2) are rotatably connected to the lower end face of the two longitudinal beams (12). Several connecting rods (13) are fixedly connected between the two longitudinal beams (12). Three baffles (14) are fixedly provided on the rear side of the connecting rods (13). The inner ends of the two tightening cylinders (10) are rotatably connected to the middle baffle (14), and the outer ends of the two tightening cylinders (10) are rotatably connected to the corresponding outer baffles (14).
5. The lifting trolley with safe lifting effect according to claim 4, characterized in that: The outer surface of the outer baffle (14) is fixedly set with the corresponding servo motor (11), and the output shaft of the servo motor (11) is fixedly set with the corresponding tightening cylinder (10).
6. The lifting trolley with safe lifting effect according to claim 4, characterized in that: Several clamping blocks (15) are fixedly installed on the front side of the rear connecting rod (13). A guide sleeve (16) is fixedly installed between each two adjacent clamping blocks (15). The free end of the wire rope (6) passes through the corresponding guide sleeve (16) and is wound around the corresponding tightening cylinder (10).
7. The lifting trolley with safe lifting effect according to claim 4 or 6, characterized in that: Two fixed pulleys (17) are fixedly installed on the upper end of the connecting rod (13) on the rear side. The free end of the wire rope (6) passes through the guide sleeve (16) and is connected to the corresponding fixed pulley (17) for transmission, and then is wound around the corresponding tightening cylinder (10).
8. The lifting trolley with safe lifting effect according to claim 1, characterized in that: A fall arrestor (18) is fixedly installed on the wire rope (6) above the guide sleeve (16). When the position of the fall arrestor (18) on the wire rope (6) is in contact with the fall arrestor (18), the lengths of the two wire ropes (6) released from the drum (3) are equal.
9. The lifting trolley with safe lifting effect according to claim 4, characterized in that: A gearbox (19) is fixedly installed on the upper end face of the left longitudinal beam (12), and a power motor (4) is fixedly installed on the corresponding connecting rod (13). The output shaft of the power motor (4) is fixedly installed with the input shaft of the gearbox (19), and the output shaft of the gearbox (19) is fixedly installed with the winch (3).
10. The lifting trolley with safe lifting effect according to claim 4, characterized in that: The inner sides of both longitudinal beams (12) are fixedly equipped with a moving motor (20), and the output shaft of the moving motor (20) is fixedly set with the corresponding roller (2).